Air treatment apparatus



FIG. 1 is a perspective view of an air treatment apparatus, showing mynew design from the top, front and left side;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is bottom plan view thereof.

Broken lines represent details which form no part of the claimed design.

The ornamental design for an air treatment apparatus, as shown and described. 